The bird that cannot fly and is known for its speed is the ostrich. Native to Africa, the ostrich is the largest living bird and is famous for its incredible running capabilities. Capable of reaching speeds up to 45 miles per hour, ostriches use their long legs and powerful stride to escape predators and cover considerable distances. Although flight is not an option due to their size and weight, ostriches have developed other adaptations, such as strong legs for running and a keen sense of sight. Their unique behaviors and capabilities make them fascinating subjects of study in the avian world.